test: add simpler resize test with nearest interpolation (#451)

Author: targos

Diff for: src/geometry/__tests__/resize.test.ts

@@ -1,6 +1,18 @@
 import { encodePng } from '../../save';
 
-test.skip('compares result of resize with opencv', () => {
+test.skip('compare result of resize with opencv (nearest)', () => {
+  const img = testUtils.load('opencv/test.png');
+
+  const resized = img.resize({
+    xFactor: 10,
+    yFactor: 10,
+    interpolationType: 'nearest',
+  });
+
+  expect(resized).toMatchImage('opencv/testResizeNearest.png');
+});
+
+test.skip('compare result of resize with opencv (bilinear)', () => {
   const img = testUtils.load('opencv/test.png');
 
   const resized = img.resize({

Diff for: test/TestImagePath.ts

@@ -36,6 +36,7 @@ export type TestImagePath =
   | 'opencv/testRotateBilinear.png'
   | 'opencv/testTranslate.png'
   | 'opencv/testResizeBilinear.png'
+  | 'opencv/testResizeNearest.png'
   | 'opencv/testAntiClockwiseRot90.png'
   | 'opencv/testClockwiseRot90.png'
   | 'opencv/testScale.png'

Diff for: test/img/opencv/generate.py

@@ -13,6 +13,8 @@
 cv.imwrite('testScale.png', dst)
 
 # Image resizing by 10.
+dst = cv.resize(img, (80, 100), interpolation=cv.INTER_NEAREST)
+cv.imwrite('testResizeNearest.png', dst)
 dst = cv.resize(img, (80, 100), interpolation=cv.INTER_LINEAR)
 cv.imwrite('testResizeBilinear.png', dst)